Comment 29 for bug 1840232

Possible causes of "No space left on device"...

(1) System is running out of inodes, even if there is enough disk space...

https://scoutapm.com/blog/understanding-disk-inodes

(2) Since the the OS has not been installed, this link claims that the VM is using available memory, and that causes the "No space left on device" error...

https://stackoverflow.com/questions/39375548/virtualbox-doesnt-have-enough-space-left-on-device

(The person who posted this never gave a good explanation, but I thought I'd share it anyway)